Vacuum cleaner attachment adapter



FIG. 1 is a perspective view of a vacuum cleaner attachment adapter showing my new design;

FIG. 2 is a side view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a top view thereof; and,

FIG. 5 is an exploded perspective view thereof. 

The ornamental design for a vacuum cleaner attachment adapter, as shown and described. 